Ionia Weather Forecast

    • 36
    • 54

    Mostly Sunny

    • 46
    • 63

    Mostly Sunny

    • 49
    • 66

    Partly Sunny

    • 54
    • 68

    Mostly Cloudy

    • 55
    • 69

    Chance Rain Showers

    • 48
    • 66

    Chance Rain Showers

Today 31 Oct Ontario

Sunny. Highs Ranging from around 50 on the Hilltops to the mid 50s across the lower Elevations. West Winds 10 Mph or less.

Tonight 31 Oct Ontario

Mainly clear in the Evening, then becoming partly cloudy. Lows in the mid 30s. Light southwest Winds.

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  • Temperature Real-Time

Ionia Temperature Statistics

October Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 21 October, 2026

    31.6 °F

  • Average October

    54 °F

  • Highest 13 October, 2026

    82.7 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.1 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    59.5 °F
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